I use to use a UTG style vest. This was the best upgrade, vest wise, I chose. It cost a bit more to build, but I rather have quality and customization over price.
-Basically the sky is the limit with this rig. A lot of different possibilities!
-NO CRAPPY ZIPPERS THAT BREAK OR FALL OFF!
-Removable dividers to fit AK mags.
-Easy to put on and take off with just on buckle!
The only real con about this rig is that, you will literally sit for a while, thinking about how you want to set it up.